47240309 has 2 divisors, whose sum is σ = 47240310. Its totient is φ = 47240308.

The previous prime is 47240299. The next prime is 47240329. The reversal of 47240309 is 90304274.

47240309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38812900 + 8427409 = 6230^2 + 2903^2 .

It is a cyclic number.

It is not a de Polignac number, because 47240309 - 2¹⁶ = 47174773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47240329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23620154 + 23620155.

It is an arithmetic number, because the mean of its divisors is an integer number (23620155).

Almost surely, 2^47240309 is an apocalyptic number.

It is an amenable number.

47240309 is a deficient number, since it is larger than the sum of its proper divisors (1).

47240309 is an equidigital number, since it uses as much as digits as its factorization.

47240309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 47240309 is about 6873.1585897606. The cubic root of 47240309 is about 361.4966218637.

The spelling of 47240309 in words is "forty-seven million, two hundred forty thousand, three hundred nine".